f(T) theories and varying fine structure constant

In analogy to f(R) theory, recently a new modified gravity theory, namely the so-called f(T) theory, has been proposed to drive the current accelerated expansion without invoking dark energy. In the present work, by extending Bisabrʼs idea, we try to constrain f(T) theories with the varying fine str...

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Bibliographic Details
Published in:Physics letters. B 2011-09, Vol.703 (1), p.74-80
Main Authors: Wei, Hao, Ma, Xiao-Peng, Qi, Hao-Yu
Format: Article
Language:English
Subjects:
[formula omitted] theory
Analogies
Dark energy
Elementary particles
Exact sciences and technology
Fine structure
Gravitation
Modified gravity
Nuclear physics
Physics
Plancks constant
The physics of elementary particles and fields
Varying fine structure constant
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Summary:In analogy to f(R) theory, recently a new modified gravity theory, namely the so-called f(T) theory, has been proposed to drive the current accelerated expansion without invoking dark energy. In the present work, by extending Bisabrʼs idea, we try to constrain f(T) theories with the varying fine structure “constant”, α≡e2/ℏc. We find that the constraints on f(T) theories from the observational Δα/α data are very severe. In fact, they make f(T) theories almost indistinguishable from ΛCDM model.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2011.07.042